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Setting up Telnet to access your device involves the following steps, depending on whether you're setting up a Telnet client or a Telnet server.

Yes, there are alternative options for running a Telnet server on Ubuntu or similar systems. Here are a few:

SETTING UP TELNET SERVER

other options failed, , inetd works best but has been giving me problems with setups. , the conf provided should be used, dont change it

1. Alternative: Use inetd Instead

If xinetd still fails, switch to inetd:

  1. Install inetutils-telnetd:

    sudo apt install inetutils-telnetd

  2. Edit /etc/inetd.conf:

    sudo nano /etc/inetd.conf

    Add this line:

    telnet stream tcp nowait root /usr/sbin/in.telnetd in.telnetd

  3. Restart inetd:

    sudo systemctl restart inetutils-inetd

Check if it’s running:

sudo netstat -tulnp | grep :23

Let me know what happens after these steps! 🚀

Telnet Client

To connect to your Ubuntu-based Telnet server from a Windows device, follow these steps:

WORKING CLIENT PUTTY

Certainly! Let's break down PuTTY and explain its various settings in a clear, structured manner. Below is a setup guide for Telnet in PuTTY that you can copy and apply to your configuration:

PuTTY Setup for Telnet Connection

  1. Download and Install PuTTY:

    • Go to the official PuTTY download page.
    • Download the installer for your system (32-bit or 64-bit).
    • Install PuTTY by following the on-screen instructions.

    • Open PuTTY:

    • After installation, launch PuTTY.

Step 1: Configure Basic Session Settings

  1. Session:

    • Host Name (or IP address): Enter the IP address of the server where your Telnet service is running. If it’s a local server or a VM, you can use localhost or the VM’s internal IP.
      • Example: 192.168.1.100 or localhost.
    • Port: Enter 23, which is the default port for Telnet.
    • Connection Type: Select Telnet (this will automatically set the port to 23).

    Example Settings:

    • Host Name: 192.168.1.100 (or localhost for a local server)
    • Port: 23
    • Connection Type: Telnet

    • Save the Session (optional):

    • Under Saved Sessions, enter a name for this session (e.g., MyTelnetServer).

    • Click Save so you can easily load this session later.

Step 2: Configure Terminal Settings (Optional)

  1. Terminal Settings:
    • In the left panel, expand Window > Terminal.
      • Set The Backspace key to Control-H. This is common to ensure that the backspace key works correctly when typing.
  2. Local Echo Settings:
    • Still under the Window section, go to Terminal > Telnet.
      • Ensure Local echo is set to Auto or Force off to prevent double input (this is often what causes unwanted duplication of characters when typing).
  3. Disable Remote-Controlled Terminal Type:
    • Under Connection > Telnet:
      • Uncheck Disable remote-controlled terminal type.
      • This ensures that the server doesn't override any terminal settings you want to use.

Step 3: Configure Window Settings

  1. Window Settings:

    • Under Window > Behaviour:
      • Set the window’s title (optional) and adjust the appearance settings (font, colors, etc.) if needed.

    • Line Discipline Options:

    • Make sure Disable remote-controlled printing is checked.

Step 4: Start the Connection

  1. Once you've configured the settings, click Open to start the connection.

  2. If it's the first time connecting to the server, you'll receive a security warning about the server's host key. Click Yes to proceed.

  3. Login Prompt: After the connection is established, you’ll be prompted to enter the login credentials for your Telnet server. Enter your username and password.

Summary of Important Settings:

  • Host Name (or IP address): 192.168.1.100 (or the IP of your Telnet server)
  • Port: 23
  • Connection Type: Telnet
  • Local Echo: Set to Auto or Force off.
  • Backspace Key: Set to Control-H.
  • Disable Remote-Controlled Terminal Type: Unchecked.
  • Disable Remote-Controlled Printing: Checked.

PuTTY Interface Breakdown

  1. Session (Top Level):

    • This is where you define the connection settings (IP address, port, connection type).
    • Saved Sessions allows you to save these settings for later use, so you don't have to re-enter them every time.

    • Window:

    • Controls the terminal behavior. You can adjust settings such as font, color, window size, and more.

    • Terminal:

    • Handles text display settings like echoing characters, handling of backspace, and other character-related settings.

    • Connection:

    • Allows you to adjust how the connection behaves, such as timeouts or settings specific to Telnet.

    • Telnet:

    • This category has options for Telnet-specific configurations like local echo and terminal type.

Quick Troubleshooting Tips for Input Issues:

  • Local Echo: If you experience double characters, go to Window > Terminal > Telnet and ensure Local echo is set to Auto.

  • Backspace Key: If backspace doesn't work, try setting the Backspace key to Control-H under Window > Terminal > Keyboard.

  • Remote Control: If you continue to face issues, make sure Disable remote-controlled terminal type is unchecked under Connection > Telnet.

By following these steps, you should be able to connect to your Telnet server using PuTTY on Windows and have a smooth interaction without input issues.

Let me know if you'd like further clarification or additional assistance!

1. Install Telnet Client on Windows (if not already installed)

Windows 10 and above do not have Telnet enabled by default, so you'll need to enable it first.

Enable Telnet Client on Windows

  1. Open Control Panel.
  2. Go to Programs > Turn Windows features on or off.
  3. Scroll down and check Telnet Client.
  4. Click OK and wait for the installation to complete.

Alternatively, you can enable Telnet via PowerShell:

Enable-WindowsOptionalFeature -Online -FeatureName TelnetClient

2. Open Command Prompt (or PowerShell)

  • Press Win + R, type cmd (or powershell), and press Enter to open the Command Prompt or PowerShell.

3. Connect to the Telnet Server

You will need the IP address of the Ubuntu machine where the Telnet server is running. You can get the IP address on the Ubuntu machine using:

ip a

The IP address will typically be something like 192.168.x.x for local connections.

Now, from the Windows Command Prompt or PowerShell, run the following command:

telnet <server_ip_address> 23
  • Replace <server_ip_address> with the actual IP address of the Ubuntu machine running the Telnet server.
  • If the server is on the same machine, you can use localhost or 127.0.0.1:
telnet localhost 23

or input
telnet 

open localhost

4. Use Telnet

Once you run the telnet command, you'll be connected to the Telnet server. If the server is running successfully and listening on port 23, you'll be able to send and receive messages or commands.

5. Handling Authentication (if applicable)

If your Telnet server requires a username and password for authentication, you will be prompted for these credentials after connecting. You will then have access to the server's features or menu as defined in your Java program.

6. Troubleshooting

  • Telnet not working: If you get a "connection refused" or "could not connect" message, it might be due to firewall rules or the Telnet server not running.

    On the Ubuntu server, make sure the firewall allows incoming Telnet traffic:

    sudo ufw allow 23/tcp
sudo ufw reload

  • Server not running: Make sure the Telnet service is up and running on your Ubuntu machine. If it's not, start it by running:

    sudo systemctl start telnetd

    If the Telnet server isn't installed, you can install it using:

    sudo apt-get install telnetd
sudo systemctl enable telnetd

Once you're connected to the Telnet server, you should be able to interact with your application as designed.